docs: def _utc_to_local(self, data, local_zone="America/Los_Angeles"):
          """ Adjust index of dataframe according to timezone that is requested by user.
  
          Parameters
          ----------
          data        : pd.DataFrame()
              Pandas dataframe of json timeseries response from server.
  
          local_zone  : str
              pytz.timezone string of specified local timezone to change index to.
  
          Returns
          -------
          pd.DataFrame()
              Pandas dataframe with timestamp index adjusted for local timezone.
          """
  
          # Accounts for localtime shift
          data.index = data.index.tz_localize(pytz.utc).tz_convert(local_zone)
          
          # Gets rid of extra offset information so can compare with csv data
          data.index = data.index.tz_localize(None)
  
          return data